build the form dynamically

I would like build the SE16 function using FPM. Thus, the field catalog for the selection option is dynamic which depend on the table name you input.

Now I have 2 form UIBB. One is for inputting table name and one for displaying selection options.

I would like to use wire to transfer the table name from form 1 to form 2. However, the connector is filled after GET_DEFAULT_CONFIG, in which I will write the code to dynamically display selection options. so this options seems not work. Is there any other options I could use to achieve this?